# Relationship history for MSHA mine 1507337

Current hierarchy: **Bledsoe James E → B M Mining & Milling Co Inc → No 6 Mine**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** West Lonzo → No 6 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bledsoe James E → No 6 Mine; 1974-07-27 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Red West & Son Coal Co → No 6 Mine; 1974-09-01 to 1975-10-01; source msha-controller-operator-history
- **controller_controls_operator:** West Lonzo → Red West & Son Coal Co; 1974-09-01 to 1975-10-01; source msha-controller-operator-history
- **operator_operates_mine:** B M Mining & Milling Co Inc → No 6 Mine; 1975-10-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bledsoe James E → B M Mining & Milling Co Inc; 1975-10-02 to current/open; source msha-controller-operator-history